Pulverizing or grinding mill.



J. W. FULLER, JR. PULV'BRIZING 0R GRINDING MILL.

APPLICATION FILED AUG. 22, 1907.

922,468. Paten ed May 25, 1909.

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J. W. FULLER, JR. PULVERIZING 0R GRINDING MILL.

APPLICAIION TILED AUG. 22, 1907.

Patented May 25, 1909.

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JAMES W. FULLER, JR, OF GATASAUQUA, PENNSYLVANIA.

PULVERIZING OR GRINDING MILL.

Specification of Letters Patent.

Patented. May 25, 1909.

Application filed. August 22, 1907. Serial No. 389,646.

To all whom it may concern:

Be it known that 1, JAMES W. FULLER, J12, a citizen of the UnitedStates, residing at Catasauqua, in the county of Lehigh and State ofPennsylvania, have invented certain new and useful Improvements inPulverizin g or Grinding Mills, of which the following is aspecification.

My invention has relation to a pulverizing or grinding mill; and in suchconnection it relates particularly to the constructive arrangement ofthe mill as hereinafter more fully described and then claimed.

The nature and characteristic features of my invention will be morefully understood from the following description taken in connection withthe accompanying drawings forming part hereof, in which Figure 1 is aview, illustrating partly in vertical central section and partly inelevation, a pulverizing or grinding mill, a grinding ring having alaterally extending projec tion supporting the grinding balls andforming in conjunction with the bottom of the casing a chamber, a yokehaving a substantially conical-shaped body p ortion supporting pushersfor the grinding balls and rings for carrying the wings. Fig. 2 is aview, illustrating partly in longitudinal section and partly in top orplan, the yoke for carrying pushers having a bearing for the balls and acurved face forming in conjunction with the balls and ring a chamber tofacilitate the entrance of materials to be ground into the path of theballs and exit of ground matter from the ring; and Fig. 3 is a detailview illustrating in section a portion of the mill and arrangement ofbolting and protecting screens therein.

Referring to the drawings 4, represents the bed-plate of the pulverizingor grinding mill to which is secured a standard 5, supporting the lowerportion 7 of the sectional casing 6, the bottom 8 of which inconjunction with the bottom 9, of the casing 6 forms a discharge chamber11, for ground material. Within the casing 6, and upon the bottom 9thereof, is arranged the grinding-ring 12, which is provided with alaterally inwardly extending projection 14, of sufficient width, tosupport the grinding balls 16 and to form the continuation of a grindingsurface 15, of the ring 12, which terminates in a straight portion 18,slightly projecting over the upper portion of the grinding surface 15.The ring 12, is held in position on the bottom 9, preferably by anannular rib engaging a depression 56, arranged in the bottom 9, and by asimilar rib 58, engaging a depression 60, in the frame 21. The turningof the ring 12, between the bottom 9 and frame 21, is prevented by lugs61, engaging lugs 62 of the casing 6. Beyond the ring 12, the bottom 9,is provided with a substantially conical portion 10, which inconjunction with the straight lower portion 19, of the ring 12, forms anannular chamber 20, for a purpose to be presently more fully described.

Upon the casing 6, is arranged a frame or basket 21, adapted to supportan outer fine or bolting screen 22, and coarse inner or protectingscreens preferably, consisting of perforated metal plates 23. Outsidethe screens 22 and 23, the basket 21, supports a casing or shell 24,which in conjunction with the screens forms a receiving chamber 25, forground materials which by means of ducts 26, arranged in the frame 21,semi-circular passages 53 formed by the grinding-ring 12 casing 6, lugs61 and 62, and ducts 54 in the bottom 9, thereof is connected with thedischarge chamber 11. The frame or basket 21, is closed at its u per endby a ring 28, and a plate 29, removiibly secured thereto, and upon thisplate is arranged a bearing 30, for the driving-shaft 31, arrangedvertically and centrally in the mill. The shaft 31, passes through theplate 29, and the upper and lower bottoms S and 9 of the sectionalcasing 6, and terminates in a bearing 32, arranged on the bed-plate 4.Between the lower bottom 8, and bed-plate 4, the shaft 31, is providedwith a pulley 33, by means of which the shaft is driven from anysuitable source of power, not shown. ithin the dischargechamber 11, theshaft 31, serves to support a sweeper 34, the peripheral inclinedportion 35, of which terminates opposite discharge ports 36, arranged inthe portion 7, of the sectional casing 6.

To the shaft 31, within the casing 6, is removably secured a yoke orframe 37, hav ing a centrally substantially conical-shaped body portion38, from the lower portion of which radiates arms 39, supporting pushers40, between which the balls 16, are arranged and are revolved on thering 12. Each of the pushers 40, consists of a substantial segmentalbody, provided with an outwardly flaring and indented active or bearingface 41, against which the ball 16, abuts, during its actuation by thepusher, and with an inactive straight and preferably slightly curvedface 42, which in conjunction with the adjoining ball 16, forms anopening 43, to facilitate entrance of unground materials by the conicalportion 38, of the yoke 37 into the path of the grinding balls 16, aswell as exit of ground matter from the balls 16 and ring 12, by means ofWings, hereinafter more fully described. From the conical portion 38, ofthe yoke or frame 37, radiate a second series of arms 44, which serve tolimit the upward movement of the balls 16, and by means of verticallyarranged extensions 47, also support a ring 45, to which are secured aseries of wings 48, arranged obliquely with respect to the ring 45. Byextensions or distance-pieces 46, the ring 45, supports a second ring49, to which are secured a second series of wings 50, likewise obliquelyarranged with respect to their supporting ring 49. These Wings 50, arearranged intermediate of the lower wings 48, and when both series ofwings are set in rotation by means of the rings 45 and 49, yoke 37, andshaft 31, the lower series 48, rotating directly above the balls 16 andring 12 lift the ground materials from the ring 12, aided in this actionby the openings 43, between the balls and pushers. The lower series ofwings 48, conduct the ground materials into the path of the upper seriesof wings 50, which checks and deflects then sidewise the uplifted groundmaterials under force against and through the screens 22 and 23. Theground materials of sufficient fineness readily pass the outer orbolting screen 22, and reach the receiving chamber 25, from which thesame passes through the ducts 26, passageways 53, and ducts 54, into thedischarge chamber 11, and onto the sweeper 34, thereof, which latterconducts the material into the discharge ports 36, of the lower portion7, of the casing 6.

Ground matter which does not pass through the bolting screen 22, dropsback onto the portion 14, of the ring 12, into the path of the balls 16,as well as material to be ground, which is introduced into the millthrough the opening 51, arranged in the plate 29. This opening 51, is solocated as to permit of the descent of the material to be ground throughthe wings 48 and 50, and rings 45 and 49, directly onto the conicalportion 38, of the yoke 37, which conducts the same onto the projection14, and grinding surface 15, of the ring 12, and into'the path of theballs 16. Foreign matter, such for instance, as metal objects enteringthe mill with the material to be ground, are removed by the balls 16,from the ring 12, into the collecting chamber 20, away from the balls 16and ring 12. The chamber 20, although it may be filled with groundmatter it will permit any metal objects by their greater weight to embedin the ground matter and thus held by the same without in the leastinterfering with the proper entrance of matter to be ground to thegrinding ring 12.

As the balls 16, are arranged in proximity to the conical portion 10, ofthe bottom 9, of the casing 6, and to the yoke 37 the space 52, providedfor the reception of material to be ground and of the ground matter isso small as to prevent any considerable accumulation of the same at thebottom 9, of the casing 6. Moreover the distance from the projection 14,of the ring 12, supporting the balls 16, to the lower series of wings48, is reduced to such an extent as to permit of a most effectivesuction action of the wings on the ground material, aided by thereduction in size of the receiving space 52, for the materials which isthus quickly and effectively removed and elevated into the path of theupper series of wings 50, which force the ground matter against thescreens 22 and 23, unhampered by the materials to be ground descendingthrough the central upper portion of the mill.

Having thus described the nature and objects of my invention what Iclaim as new and desire to secure by Letters Patent is In a pulverizingor grinding mill, a yoke having a base, a grinding ring locked to thebase of said yoke, said ring and yoke together forming a chamber tocollect foreign matter, and grinding balls, the base of said ringforming the support for said grinding balls and said combinedconstructive arrangement, as such, facilitating entrance of material toand from said balls, revolving within said chamber, substantially as andfor the purposes described.

In witness whereof, I have hereunto set my signature in the presence oftwo subscribing witnesses.

,JAMES W'. FULLER, JR.

Witnesses GEORGE Korr, FERD HEIMPEL.

